Machines for the making of corrugated board



Dec. '16, 1969 c. A. DAVID I 3,484,320 MACHEINES FOR THE MAKING OF CORRUGATED BOARD Filed Sept. 1, 1965 4 Sheets-Sheet 1 FIG- 3 Dec. 16, 1969 c. H. AJD VID 532 MACHINES FOR THE MAKING OF CORRUGATED BOARD Filed Sept. 1. 1965 4 Sheets-Sheet FIE-4 Dec. 16, 1969 c. H. A. DAVID v 3. 84320 MACHINES FOR THE MAKING OF CQRRUGATED BOARD Filed Sept. 1. 1965 4 sham-sheet s Dec. 16, 1969 I c. H. AQDAVID MACHINES FOR THE MAKING OF connum'rnn BOARD Filed Sept. 1, 1965 4 sheetswsheet ,4-

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FIE 11 F1512. FIE-15 United States Patent ABSTRACT or THE DISCLOSURE 'A machine for producing single-lined corrugated board containing glue applicators for both the liner and for the corrugated sheets and hydraulically operated pivotally mounted pressure roller and glue applicator for the liner adapted to swing the roller and the applicator mounting ottthe machine for improved accessibility of the corrugating rollers.

' The present invention concerns improvements relating to corrugating machines, particularly intended for the making of corrugated board.

One of the aims of the improvements concerned by my invention is to facilitate the use and, eventually, the modification of such machines in rendering their parts particularly accessible.

' Another aim of these improvements is to increase, and this in a notable manner, the qualities of the product made by such machines through the utilization of an appropriate technique for the sticking of corrugated and smooth sheets constituting such product.

The machine for corrugating and sticking being constituted by a press with fluted cylinders, a press with a smooth roller and a device for the applying of glue, my invention consists in setting the mechanism of the press with a smooth roller in a support which can turn round an axle in relation to the frame of the machine, such support being actuated by a jack to open or close the machine, so as to be able to reach the parts of the said machine easily.

My invention also consists in realizing the device for the applying of glue so that at least one part of the glue to be used should be applied on a lining sheet which constitutes the product made by the machine.

According to a modification one of the guides at least, maintaining the corrugated sheet on one of the fluted cylinders of the machine is mounted on a bar pressing against an adjustable stopping member.

According to another modification the gluing device is provided with means intended to remove the glue from the surfaces of its applying roller situated on both sides of the width of the product to be glued.

According to a further modification the machine is provided with a moistening device through steam of the product to be corrugated, such device being provided with a heating system regularizing the process of condensation of the steam on the said product.

My invention consists in some other arrangements hereinafter mentioned and preferably used together with the above-mentioned main arrangements.

My invention particularly covers certain modes of ap- 3,484,320 Patented Dec. 16, 1969 plication and realization of the said arrangements and also the corrugating machines provided with such improvements.

By way of example and to provide a better understanding of my invention, a specification of the particular modes of carrying out of the invention is given hereinafter. to the same being illustrated in a schematic and non-restrictive manner in the accompanying drawing. In said drawing:

FIGURE 1 partially shows, in elevation and in section through a vertical plane, a corrugating machine realized according to the invention;

FIGURE 2 shows in section a glue applying device, according to the invention;

FIGURE 3 is a view of the said device along the arrow F of FIGURE 2;

FIGURE 4 shows another mode of applying glue;

FIGURES 5 and 6 represent in section two modifications of the glue applying devices according to the mode of FIGURE 4;

FIGURE 7 partially shows in section through a vertical plane, a modification of such corrugating machine;

FIGURE 8 shows in elevation a special squeegee roller fitting the gluing device of this modification;

FIGURE 9 is a developed view of the surface of such roller;

FIGURE 10 is a section of FIGURE 9 through the plane A--A; and

FIGURES ll, 12 and 13 are sections of FIGURE 8 through the planes BB, 0-0 and DD respectively.

If it is intended to realize a corrugating machine according to my invention, one proceeds as follows or in a similar manner.

The machine, selected as an example; is intended to make corrugated board called single-faced, obtained through gluing of a lining sheet 1 on the tips of a sheet 2 corrugated through passing into the press with fluted cylinders 3 and 4. The gluing of the lining sheet 1 on the corrugated sheet 2 is obtained after applying of the glue, in pressing in 5 the two sheets by means of the press with a smooth roller 6.

According to the invention, the mechanism of the press with a smooth roller 6, comprising, besides the roller 6 other rollers 7, 8 and eventually parts connected with these rollers, is held by a support 9 articulated in an axle 10 on the frame 11 of the machine. A jack 12, articulated in an axle 13 on the frame 11 and the movable rod of which is articulated in an axle 14 on the support 9, actuates the said support 9 to open or close the machine. When open the support is in the position 9a, giving an easy access to the parts of the machine. 'When the support 9 is closed, the jack 12 ensures the pressing of the smooth roller 6 against the sheets to be glued and the fluted cylinder 3.

The facility of access, given by the openable support 9, permits inter alia to proceed to the adjustment or replacement of the guide 15 or of the glue applying device 16.

The guide. 15, maintaining the corrugated sheet on the fluted cylinder 3, is held by a tr-ansversal bar 17 parallel to the axes of the cylinders. Each finger of the guide is fixed to the said bar through an elastic support 18. Another guide is maintained by means of the transversal bar 19. Such disposition permits to maintain the guides etficiently and, in reducing the overhang of the. said guides, avoids deformations which would be prejudicial to the quality of the corrugated board thus manufactured.

The accessibility given by the openable support 9, permits to render the bar 17 as well as the glue applying device 16 vertically movable. By lowering the bar 17 and the device 16, it is possible to have. an easy access to the guides of the bars 17 and 18.

The glue applying device may be placed in 16 so as to apply the glue 21', as known, on the tips of the corrugated sheet 2, but, according to another main characteristic of the invention, it is possible to apply oh the lining sheet 1 at least a part of the glue to be. used so as to remedy the usual defects of gluing. Such defects occur on the lines corresponding to the guides, because of the grooves provided in the applying roller of the device 16 for the passing of the guides.

For that purpose, the usual glue applying device 16 is supplemented by another device 20 which ensures the applying of glue lines 21 on the sheet 1 before the guides.

The glue lines 21 are parallel to the direction of the shifting of the sheet 1.

As a modification, the whole of the glue to be used may be applied on the sheet 1 by the printing of transverse glue. lines 22 on the sheet, said lines being parallel and equidistant according to the pitch of the corrugations of the cylinders 3 and 4. For that purpose, a glue applying roller 23 is provided. The rotation of the roller 23 is synchronized with that of the cylinders 3 and 4 anti the said roller is provided with corrugations 24 the external faces of which print on the sheet 1 the glue lines 22 in the manner of a typographical printing-press. The external faces of the corrugations 24 are coated by the roller 25 which is connected with the doctor roller 26 and the squeegee roller 27; these faces may be brushed by the brush roller 28. The printing of the lines 22 on the sheet 1 may also be made after the manner of an heliographic printing-press, the glue being brought in the intervals 29 existing between the corrugations of the roller 23. A squeegee 30 removes the glue which is on the periphery of the roller 23.

Such techniques for the applying of glue on the lining sheet permit to replace the tin fingers of the usual guides by a reduced number of guides which are broader and stronger. These guides may be provided with fingers which are thin at their ends so as to disengage the corrugated sheet from the upper fluted cylinder.

Eventually, one part of the glue might still be applied on the tips of the corrugated sheet by means of the conventional device 16, the rest of the glue to be used being printed, as described, according to the lines 22.

Obviously, the above described arrangements are applicable to the making of products which are constituted by more. than two glued sheets.

As a modification, the machine, receiving the sheet 2 corrugated by passing into the press with fluted cylinders 3 and 4, is provided with guides 31, 32 maintaining the corrugated sheet on the cylinder 3. The fingers of one of the guides, but preferably the fingers of the two guides 31, 32, are held by the bars 33, 34, respectively.

The bar 33 is vertically movable. To that effect, the bar 33 is fixed to a part 35 sliding into the frame of the machine. Towards the top, the shifting of the part 35 is limited by the stop of this part against one or several eccentrics 36 held by a shaft 37 which can turn in the frame and can be fixed in relation to the latter. The rotation of the shaft 37 ensures the adjustment of the stopping point of the part 35, and consequently, the adjustment of the upper position of the bar 33 and of the guide 31. Therefore the bearing of the guide 31 can be easily adjusted on the corrugated sheet 2, engaged into the corrugations of the cylinder 3. In order to maintain such bearing, while reserving the possibility of slightly disengaging the guide 31 by lowering it, in case of difficulty, the part 35 is applied against the eccentrics 36 by the piston 38 of an hydraulic jack the cylinder 39 of which is integral with the support of the gluing device 40 incorporated to the machine. The support of the. gluing device 40 is itself mounted on jacks, such as 41, in order to be. lowered or raised into the machine.

The pipe 42, feeding the cylinder 39, is connected with an hydraulic accumulator, giving elasticity to the bearing of the piston 38 on the part 35. This part and the guide 31 can thus be lowered if an abnormal strain acting on the fingers happened to be contrary to the bearing given by the pressure in the. accumulator 43.

The bar 34, holding the guide 32, is supported by the arms 44 articulated in 45 on the frame of the machine. The arms 44 are urged by a jack 46 which may be connected with the accumulator 43 or with another accumulator. An adjustable stopping with a screw 47 limits the action of the jack 46 on the guide 32, the working of this device being substantially identical to that above-mentioned in relation to the guide 31.

Eventually, the above-mentioned jacks may be replaced by springs.

In order to prevent the roller 48, applying glue on the tips of the corrugations of the sheet 2, from applying the same in a useless and injurious manner on the cylinder 3, when the width of the sheet is less than the length of the corrugations of said cylinder, according to the invention, a special squeegee roller 49 has been provided the said squeegee roller may be in several parts, its parts of generatrix coming into contact with the roller 48, ensure the removing of glue from the surfaces of the roller 48 situated on both sides of the width of the sheet 2.

Tothat effect, the roller 49 which is ordinarily fixed in the gluing device 40 but may be turned and fixed around its axis 50, has its external surface, coming into contact with the roller 48, hollowed according to two symmetrical identical helices 51, 52. According to the position of the roller 49 around its axis, a generatrix of contact with the roller 48 is obtained the said generatrix being interrupted in an adjustable manner, corresponding to the width of the sheet 2 between the two helices. Thus the glue remains on the roller 48 between the two helices in order to coat the sheet 2 while it is removed by means of the roller 49 on both sides of the width of the sheet.

The effect of the roller 49 may be completed by that of air jets placed in the vicinity of the generatrix of contact of the rollers 48 and 49, blowing so as to make the glue fall down again into the pan of the gluing device.

The machine is also provided with a steam moistening device of the sheet 2 to be corrugated. The moistening steam issues out of the nozzles 53, provided with a valve and fed by means of a pipe 54 receiving the steam under the pressure corresponding to the required moistening. In order to regulan'ze the process of condensation of such steam, the pipe 54 is enclosed in a jacket 55, the same being heated by steam. Owing to such disposition, it is possible to avoid premature and irregular condensations at the outlet of the nozzles 53, as such condensations might hinder a uniform moistening of the sheet.

Of course, the invention is not restricted to the methods of application and realization specifically indicated; it also embodies all the variants.

What I claim is:

1. A machine for corrugating and applying of glue for the production of corrugated board having a lining sheet and a corrugated sheet, said machine comprising a frame, a first press having at least one fluted cylinder, a second press having a smooth cylinder, means for applying said glue to said corrugated sheet, an axle in said frame, a support being rotatable about said axle in relation to said frame, said second press mounted in said support, a jack moving said support into and out of operating position with respect to said first press, guides for holding said corrugated sheet on one of said fluted cylinders, a transverse bar between said frames, an adjustable stop and elastically supporting means, at least one of said guides 5 mounted on said bar, said bar being urged by said elas' tically supporting means against said stop.

2. A machine according to claim 1, wherein said elastically supporting means comprises an hydraulic jack and an hydraulic accumulator, said jack being connected to said accumulator.

3. A machine according to claim 1, wherein said means has a roller and comprises further means, for removing said glue from said roller on both sides of the Width of said sheets.

4. A machine according to claim 3, wherein said further means comprise a squeegee roller having two recessed symmetrical identical helices on the periphery thereof.

References Cited UNITED STATES PATENTS 10 HAROLD ANSHER, Primary Examiner H. F, EPSTEIN, Assistant Examiner US. Cl. X.R. 

